Touch window
Disclosed are a technology capable of improving printing properties and a structure of a touch window manufactured by the same. The touch window according to the present invention comprises: a sensing electrode pattern layer formed on a transparent window and including sensing electrodes which are patterned; and wiring parts connected to the sensing electrodes, wherein the touch window further comprises dummy circuit patterns spaced apart from the wiring parts.
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This application claims the benefit under 35 U.S.C. §119 of Korean Patent Application No. 10-2011-0050351, filed May 26, 2011, which is hereby incorporated by reference in its entirety.
BACKGROUND1. Field of the Invention
The present invention relates to a technology capable of improving printing properties of a wiring pattern, and a structure of a touch window manufactured by the same.
2. Description of the Related Arts
A touch window is a device that is installed on a display surface of an image display device such as a cathode ray tube (CRT), a liquid crystal display (LCD) device, a field emission display (FED) device, a plasma display panel (PDP) and an electro luminescence device (ELD) so that the user inputs predetermined information into a computer by applying pressure to the touch window (panel) while showing the image display device.
An aspect of the present invention is directed to provide a touch window capable of solving the aforementioned problems.
Another aspect of the present invention is directed to provide a structure of a touch window in which a dummy pattern is designed and inserted to a wiring pattern before the printing of a wiring pattern is performed, thereby inhibiting an increase in line width of a printing section of an initial wiring and improving emotional quality of printing.
Exemplary Embodiments of the present invention is directed to provide a touch window comprising: a sensing electrode pattern layer formed on a transparent window and including sensing electrodes which are patterned; and wiring parts connected to the sensing electrodes, wherein the touch window further comprises dummy circuit patterns spaced apart from the wiring parts.
In accordance with exemplary embodiments, the present invention is advantageous that a dummy pattern is implemented at an outer angle of a wiring pattern connected to a sensing electrode of a touch window so that an increase in line width due to a printing defect generated at a first line of an outmost angle of a wiring part and a shot defect due to the increase in line width are removed, thereby being capable of improving printing quality.
The above and other aspects, features and advantages of certain exemplary embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings, in which:
Exemplary embodiments according to the present invention will now be described more fully hereinafter with reference to the accompanying drawings. In the explanation with reference to the accompanying drawings, regardless of reference numerals of the drawings, like numbers refer to like elements through the specification, and repeated explanation thereon is omitted. Terms such as a first term and a second term may be used for explaining various constitutive elements, but the constitutive elements should not be limited to these terms. These terms is used only for the purpose for distinguishing a constitutive element from other constitutive element.
Referring to the illustrated drawing, a touch window according to the present invention comprises: a sensing electrode pattern layer formed on a transparent window and including sensing electrodes which are patterned; and wiring parts connected to the sensing electrodes, wherein the touch window further comprises dummy circuit patterns D1, D2 and D3 spaced apart from the wiring parts.
Specifically, as illustrated, the dummy circuit patterns D1, D2 and D3 according to the present invention may be disposed at a position spaced apart from each other to be adjacent to the nearest first printing patterns a1, a2 and a3 in the process direction X of a pattern roll for forming printing of the wiring part. That is, the first printing patterns in a printing direction usually correspond to the wiring parts of an outermost angle. As a result of the existence of the dummy circuit patterns D1, D2 and D3, a defect problem due to an increase in line width of first printing wirings generated at the time of printing of the wiring pattern can be solved. This functions to print fine wirings to be clearer and to have reliability.
As illustrated in
Referring to
The dummy circuit patterns according to the present invention may be disposed at an outermost angle of the wiring part or the bending position where the connection pad is formed. In addition to this, a second dummy circuit pattern may be implemented between each wiring (an inner wiring part), namely, between a number of wiring parts inside the wiring part of the outermost angle.
As described above, the existence of the dummy circuit patterns raises the effect capable of improving emotional quality of printing of the wiring part.
Furthermore, the dummy circuit patterns according to the present invention may be formed of the same material as that for forming the aforesaid wiring parts. In particular, a conductive material may be used for the material. Even when a material other than the conductive material is used, it would be efficient for insulating properties, but in order to improve printing properties, the same material as the wiring part may be used.
The touch window in which the aforesaid dummy circuit patterns according to the present invention are implemented may be applied to the following structure.
As illustrated in
Unlike the structure illustrated in
Unlike the configuration of
In addition to some exemplary embodiments according to the touch window having various structures as described above, which is capable of improving printing quality of the wiring part through the dummy circuit pattern as the characteristic gist of the present invention, other exemplary embodiments may be also implemented by structures in which the pattern of the sensing electrode itself connected to the wiring part is varied.
That is, like the structure of
In the structures of the touch window of
That is, the sensing electrode pattern layer according to in an exemplary embodiment may be configured in such a manner that two sensing electrode pattern layers are disposed to be spaced apart from each other in opposite directions, shapes of the disposed patterns overlap each other, and one of the patterns has a curvature having fixed periodicity.
As illustrated in
In this case, the curvature pattern is defined as including all patterns which have fixed periodicity, and crest and trough shapes, but which are not a linear type. As illustrated in
In particular, the curvature pattern having periodicity may be formed in a structure in which the sensing electrode pattern in a linear type is disposed between an n curvature part and a (n+1) curvature part (n presents a natural number of more than 1.) Referring to the structure illustrated in
In the structure illustrated in
Unlike the aforesaid structure, wiring parts 111 and 131 for connecting the second and first sensing electrode patterns 112 and 132, respectively are formed, and the process of simultaneously forming the wiring parts and the sensing electrode patterns using a conductive material such as Ag, Al, Cu rather than using a transparent electrode material may be used. This can solve the problems in that when a pattern of the electrode is formed using an ITO material, a shape of the pattern is seen, in that the production cost increases due to the ITO material that is an expensive material, and in that it would be difficult to realize a structure having a double-sided ITO material layer on a single base substrate due to the degradation in film hardness of the ITO material. Accordingly, it is advantageous that the production cost is reduced by the process of simultaneously forming a valid part and the wiring part by forming and patterning the conductive material instead of the ITO material on an optical member, and that the process capable of realizing the freedom of various designs regardless of the degradation in film hardness is provided.
As illustrated in
That is, in the structure of the touch window illustrated in
Furthermore, as illustrated, the internal line pattern M2 may be formed by the collection of lines for connecting the inside of the external line pattern M1 in a cross structure. That is, the number of patterns having a linear structure may be formed in a net structure to cross each other. Of course, the disposition in various curved structures as well as a straight-line structure may be also applied. The sensing electrode of the mesh structure according to the present invention may transmit an electrical signal by forming lines continued by a conductive material of 3 μm-10 μm in a polygonal mesh shape. In the case, signal transmission efficiency can be largely increased by controlling a line width and a cross angle in the cross structure of the internal pattern line M2 in the mesh structure. Moreover, the process of simultaneously producing the wiring part and the sensing electrode pattern with the same material as each other is implemented, thereby being capable of increasing process efficiency. In addition to, because the ITO material is not used, the process cost can be largely reduced. Accordingly, the signal transmission efficiency resulting from the reduction of a material cost and a process cost is improved by the mesh structure, thereby realizing a product of high efficiency. Various materials such as Ag, Cu, Al may be applied to the conductive material used for the wiring and the sensing electrode used in the present invention.
That is, in the structure of
Moreover, as previously described as additional features and as illustrated in
In the detailed description of the invention, having described the detailed exemplary embodiments of the invention, it should be apparent that modifications and variations can be made by persons skilled without deviating from the spirit or scope of the invention. Therefore, it is to be understood that the foregoing is illustrative of the present invention and is not to be construed as limited to the specific embodiments disclosed, and that modifications to the disclosed embodiments, as well as other embodiments, are intended to be included within the scope of the appended claims and their equivalents.
Claims
1. A touch window, comprising:
- first sensing electrodes on a substrate;
- wiring parts connected to the first sensing electrodes;
- connection pads connected to the wiring parts; and
- at least one first dummy circuit pattern spaced apart from and electrically insulated from the connection pads;
- wherein the at least one first dummy circuit pattern is spaced between outermost wirings of the wiring parts, and at least two first dummy circuit patterns are disposed in a space closer to the outermost wirings of the wiring parts that are parallel to a closest edge of the touch window than to the connection pads.
2. The touch window of claim 1, further comprising a second dummy circuit pattern disposed between wirings included in the wiring parts.
3. The touch window of claim 2, wherein the second dummy circuit pattern is disposed in a space closer to a bending part of a second wiring of the wiring parts than to a first wiring of the wiring parts.
4. The touch window of claim 1, wherein the first sensing electrodes and the wiring parts are formed of a same material.
5. The touch window of claim 4, wherein the first sensing electrodes and the wiring parts are formed of a conductive material.
6. The touch window of claim 1, wherein the at least one first dummy circuit pattern is formed of a same material as that of the wiring parts.
7. The touch window of claim 1, further comprising second sensing electrodes on a first side of the substrate opposite to a second side of the substrate that the first sensing electrodes are disposed on.
8. The touch window of claim 1, further comprising a base substrate bonded to the substrate via a layer of adhesive material; and
- second sensing electrodes on the base substrate.
9. The touch window of claim 8, wherein the first sensing electrodes or the second sensing electrodes are formed in a plurality of units of pattern in mesh structures, each unit of pattern with a mesh structure including an external line pattern forming an outer angle part and an internal line pattern connecting an interior of the external line pattern in a cross structure.
10. The touch window of claim 9, wherein the first sensing electrodes and the second sensing electrodes are disposed to partially overlap each other, and each of the first sensing electrodes and the second sensing electrodes has a curvature part that is repeated periodically to form a curvature pattern.
11. The touch window of claim 10, wherein the curvature pattern with periodicity is configured such that a linear sensing electrode is disposed between two neighboring curvature parts of the curvature pattern.
12. The touch window of claim 1, further comprising second sensing electrodes on the substrate, wherein the second sensing electrodes are insulated from the first sensing electrodes, and wherein the substrate is a transparent.
13. The touch window of claim 1, further comprising second sensing electrodes on the substrate wherein the second sensing electrodes are insulated from the first sensing electrodes, and
- a transparent panel bonded to the substrate via a layer of adhesive material.
14. The touch window of claim 1, wherein the first sensing electrodes are formed of indium-tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), carbon nanotubes (CNT), Ag nanowires, conductive polymers, or graphene.
15. The touch window of claim 1, wherein the at least one first dummy circuit pattern is disposed between the outermost wirings of the wiring parts that are parallel to the closest edge of the touch window and the connection pads connected to a wiring adjacent to the outermost wirings; and
- wherein the connection pads are spaced apart from the outermost wirings.
16. The touch window of claim 1, wherein the at least one first dummy circuit pattern is disposed between at least one of the wiring parts and at least one of the connection pads.
17. The touch window of claim 1, wherein the at least one first dummy circuit pattern is spaced apart from and electrically insulated from the wiring parts.
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Type: Grant
Filed: May 25, 2012
Date of Patent: Feb 24, 2015
Patent Publication Number: 20130140061
Assignee: LG Innotek Co., Ltd. (Seoul)
Inventors: Dong Kyoung Lim (Seoul), Yong Jin Lee (Seoul), Young Jin Noh (Seoul), Bong Jun Park (Seoul), Jin Bok Chang (Seoul), Dong Min Kim (Seoul), Chang Ken Lee (Seoul)
Primary Examiner: Tom Sheng
Application Number: 13/481,314
International Classification: G09G 5/00 (20060101); H05K 1/03 (20060101); G06F 3/044 (20060101);